Practice Question and Answer

Q:

Which of the following is incorrect with reference to hypophysis?

1369 0

  • 1
    It lies a bony depression called sell turcica
    Correct
    Wrong
  • 2
    Connected to hypothalamus through infundibulum
    Correct
    Wrong
  • 3
    Anatomically divided into adeno-hypophysis and neurohypophysis
    Correct
    Wrong
  • 4
    Neurohypophysis synthesizes ADH and OT
    Correct
    Wrong
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Answer : 4. "Neurohypophysis synthesizes ADH and OT"

Q:

If the head of cockroach is removed, it may live for few days because :

964 0

  • 1
    The supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
    Correct
    Wrong
  • 2
    The cockroach does not have nervous system.
    Correct
    Wrong
  • 3
    Head holds a small proportion of nervous system while restis situated along ventral part of its body
    Correct
    Wrong
  • 4
    The head holds 1/3rd of the nervous system while the rest is situated along dorsal part of its body.
    Correct
    Wrong
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Answer : 4. "The head holds 1/3rd of the nervous system while the rest is situated along dorsal part of its body."

Q:

Consider following features:

(a) Organ system level of organization

(b) Bilateral symmetry  
 (c) True coelomates with segmentation of body

Select the correct option of animal groups which possess all the above characteristics.

987 0

  • 1
    Annelida, Arthropoda and Chordata
    Correct
    Wrong
  • 2
    Annelida, Arthropoda and Mollusca
    Correct
    Wrong
  • 3
    Arthropoda, Mollusca and Chordata
    Correct
    Wrong
  • 4
    Annelida, Mollusca and Chordata
    Correct
    Wrong
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Answer : 1. "Annelida, Arthropoda and Chordata "

Q:

Electronic configuration of the outer shell of the element Gd with atomic number 64 is

1228 0

  • 1
    4f4 5df 6s1
    Correct
    Wrong
  • 2
    4f3 5df 6s2
    Correct
    Wrong
  • 3
    4f5 5d4 6s1
    Correct
    Wrong
  • 4
    4f7 5d1 6s2
    Correct
    Wrong
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Answer : 4. "4f7 5d1 6s2"

Q:

Find the temperature at which the below reaction will be in equilibrium if the enthalpy and entropy change for the reaction is 30 Kj mol-1 and 105 J K-1 mol-1 respectively
Br2(l) + Cl2(g) → 2BrCl(g)

1009 0

  • 1
    273 K
    Correct
    Wrong
  • 2
    300 K
    Correct
    Wrong
  • 3
    450 K
    Correct
    Wrong
  • 4
    285.7 K
    Correct
    Wrong
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Answer : 4. "285.7 K"

Q:

What will be the work done by 3 moles of an ideal gas when it expands spontaneously in vacuum?

1193 0

  • 1
    Zero
    Correct
    Wrong
  • 2
    Infinite
    Correct
    Wrong
  • 3
    3 joules
    Correct
    Wrong
  • 4
    9 joules
    Correct
    Wrong
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Answer : 1. "Zero "

Q:

What is the function of a catalyst in a chemical reaction?

1113 0

  • 1
    Decrease rate constant of reaction
    Correct
    Wrong
  • 2
    Increases activation energy of reaction
    Correct
    Wrong
  • 3
    Reduces enthalpy of reaction
    Correct
    Wrong
  • 4
    Does not affect the equilibrium constant of reaction
    Correct
    Wrong
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Answer : 4. "Does not affect the equilibrium constant of reaction"

Q:

Find the compound which undergoes nucleophilic substitution reaction exclusively by an SN1 mechanism

965 0

  • 1
    Benzyl chloride
    Correct
    Wrong
  • 2
    Chlorobenzene
    Correct
    Wrong
  • 3
    Ethyl chloride
    Correct
    Wrong
  • 4
    Isopropyl chloride
    Correct
    Wrong
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Answer : 1. "Benzyl chloride "

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